Reinstalling the software that is triggering the error (like PVRTexTool or a specific game) is the most effective solution, as it restores the required DLL to the correct folder.
If you are a developer, the safest way to get the file is by installing the PVRTexTool from the official PowerVR Developer site. pvrtexlib.dll Download
If the file is part of a system-level process, open Command Prompt as Administrator and type sfc /scannow to repair missing or damaged system files. Reinstalling the software that is triggering the error
